Dark Heresy but with VAT from Fallout 1-2

>play Crpg
>best tactic is to always go first before everyone else
how do you solve this? Just did Void Shadows Shrine Fight and been steamrolling everything, but this fight I rolled low initiative and enemy just wiped my whole team before I could even play

>trying to doing Rykad Minoris first on highest difficulty
holy shit, this is so fucking ass